If you're new to AirPods, considering buying a pair, or just want to pick up some new tips.
Apple Accelerates Mac OS X 10.5.5 Seeding (9F17)
While difficult to predict when Apple will release this version to the public, accelerated releases with "no known issues" tend to be signs of an impending release.
Apple last updated Mac OS X with version 10.5.4 on June 30th, 2008. The next release will be a free update and is expected to incorporate over a hundred bug fixes.